Document Type

Article

Publication Title

Journal of Glaciology

Publisher

International Glaciology Society

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This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. In addition, no permission is required from the rights-holder(s) for educational uses. For other uses, you need to obtain permission from the rights-holder(s).

Publication Date

1999

First Page

517

Last Page

523

Issue Number

151

Volume Number

45

Abstract/ Summary

Stable-oxygen-isotope ratios (δ18O) collected from the headwaters of the Ürümqi river, Tien Shan, China, were used to test the relationship between δ18O temporal relationship is found between δ18O monthly averages which remove synoptic-scale influences such as changes in condensation level, condensation temperature and moisture sources (Yao and others, 1996). Linear fits as high as 0.95‰°C-1 for precipitation events and 1.23‰°C-1 for monthly averages are found. Although the δ18O (∼2 km from the precipitation sampling site) decreased dramatically compared to the precipitation samples , the ice-core records of annually averaged δ18O with contemporaneous air temperature, especially summer air temperature, at the nearby Daxigou meteorological station. Nevertheless, the relationship between the ice core δ18O records and contemporaneous air temperature is less significant than that [or the precipitation samples due to depositional and post-depositional modification processes, which are highlighted by the successive snow-pit δ18O No. 1. Our results might extend the application of high-altitude and subtropical ice-core δ18O

Citation/Publisher Attribution

Hou, S., Qin, D., Mayewski, P.A., Yang, G., & Li, Z. (1999). Climatological significance of δ18O in precipitation and ice cores: a case study at the head of the Ürümqi River, Tien Shan, China, Journal of Glaciology, 45 (151), 517-523.

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© Copyright 1999 by International Glaciology Society

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